Angle Grinder Wheel Diameter 7 in Horsepower 1 hp For Wheel Type Type 27 Max Speed 8 500 RPM Air Inlet 3/8 in NPT Female Air Inlet Connection Size 3/8 in Air Inlet Gender Female Air Inlet Type NPT Lever Type Safety Throttle Lever Spindle Thread Size 5/8 In.-11 Reach Extended Reach Duty Medium Duty Speed Ranges 8 000 to 9 500 RPM Variable Speed Yes